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Sunn Musical Equipment => Q & A => Topic started by: paco))) on July 13, 2011, 07:22:14 pm

Title: Yet another impedance question...
Post by: paco))) on July 13, 2011, 07:22:14 pm

Okay, so I wanna run my '69 1200s through my 90's 4x12(16 ohm) & 4x15 magna (4 ohm) cabs. So should I just run the 4x12 out of the amps 8 ohm output & the 4x15 from the amps 4 ohm output? Seems right to me but I just wanna make sure :? Sure makes a cool looking rig, the half stack is the exact same height as the 4x15 & all with the matching silver grill cloth. I might have changed my mind about selling that magna cab :-D

Title: Re: Yet another impedance question...
Post by: EdBass on July 13, 2011, 08:52:55 pm

That would show the 4 ohm output tap 3.2 ohms, which is probably fine except for the fact that your 4X12 will only get about 20% of the amps power.

Title: Re: Yet another impedance question...
Post by: paco))) on July 14, 2011, 01:34:17 pm

Oh well, any way around that to make better use of the amp with those two cabs?

Title: Re: Yet another impedance question...
Post by: tboy on July 14, 2011, 02:27:10 pm

Quote from: paco))) on July 14, 2011, 01:34:17 pm

Oh well, any way around that to make better use of the amp with those two cabs?

You could rewire the 4x15 cabinet for 16 ohms and then run both cabinets in parallel from the 8 ohm output.

Title: Re: Yet another impedance question...
Post by: Isaac on July 14, 2011, 05:01:20 pm

That's what I'd do.